144=x^2-5x

Solution for 144=x^2-5x equation:

144=x^2-5x

We move all terms to the left:

144-(x^2-5x)=0

We get rid of parentheses

-x^2+5x+144=0

We add all the numbers together, and all the variables

-1x^2+5x+144=0

a = -1; b = 5; c = +144;
Δ = b2-4ac
Δ = 52-4·(-1)·144
Δ = 601
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{601}}{2*-1}=\frac{-5-\sqrt{601}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{601}}{2*-1}=\frac{-5+\sqrt{601}}{-2}
$